National Pi Day

Category: Culture
National Pi Day around the world in 2023

About National Pi Day

How long until National Pi Day?
National Pi Day .
Dates of National Pi Day
2024 InternationalMar 14
International Thu, Mar 14Observances Holiday
2023 InternationalMar 14
International Tue, Mar 14Observances Holiday
2022 InternationalMar 14
International Mon, Mar 14Observances Holiday
2021 InternationalMar 14
International Sun, Mar 14Observances Holiday
2020 InternationalMar 14
International Sat, Mar 14Observances Holiday
Summary
Find out the dates, history and traditions of National Pi Day

Who Started Pi Day?

The third month, fourteenth day. Pi Day, as in 3.14. Pi Day has become an annual celebration of the mathematical constant pi (π), founded by physicist Larry Shaw. Shaw was a physicist who was a longtime employee at the Exploratorium, a science museum in San Francisco, California, and came up with the idea of “π Day” on a 1988 staff retreat, following the death of Exploratorium founder and Nobel Prize nominee Frank Oppenheimer. 

The day also happens to be Albert Einstein's birthday.

The first π Day celebration simply involved Shaw and his wife handing out slices of fruit pie and tea at 1:59 p.m., which are the three digits following 3.14, however, the holiday quickly gained fame throughout the Bay Area.

In 2009, March 14th was officially sanctioned as a U.S. holiday when the U.S. House of Representatives passed “H.Res.224 - Supporting the designation of Pi Day...”

“Whereas Pi can be approximated as 3.14, and thus March 14, 2009, is an appropriate day for ’National Pi Day’: Now, therefore, be it Resolved, That the House of Representatives—

(1) supports the designation of a ’Pi Day’ and its celebration around the world;

(2) recognizes the continuing importance of National Science Foundation’s math and science education programs; and

(3) encourages schools and educators to observe the day with appropriate activities that teach students about Pi and engage them about the study of mathematics.”

How to Celebrate Pi Day

Popular ways to celebrate include baking a pie and other circular confectionery treats, or constructing a paper pi chain where every 10 digits is a different color, and creating a collage out of circular shapes.

What is Pi?

Pi is the ratio of a circle’s circumference to its diameter.

Calculating record digits of pi has been a pastime of mathematicians for millennia. Until the 1900s, these calculations were done by hand and reached records in the 500s.

Once computers came onto the scene, that number jumped into the thousands, millions and now trillions. In 2019, Google developer Emma Haruka Iwao broke the record held by scientist and pi enthusiast Peter Trueb by calculating pi to 31 trillion digits – 31,415,926,535,897 digits to be exact.

The current world record for memorizing and reciting the most digits of pi was established by Suresh Kumar Sharma of India in 2015 when he recited a mind-boggling 70,030 digits in 17 hours and 14 minutes.

Related Observances

Read more about National Pie day

National Pie day

This pie ain't so humble. The first pie recipe was published by the Romans and was for a rye-crusted goat cheese and honey pie.

Read More

Similar Observances

Read more about Back to the Future Day

Back to the Future Day

Find out the dates, history and traditions of Back to the Future Day

Read More
Read more about World Ballet Day

World Ballet Day 🩰

Find out the dates, history and traditions of World Ballet Day.

Read More
Read more about World Audio Drama Day

World Audio Drama Day

Find out the dates, history and traditions of World Audio Drama Day

Read More
Read more about Bingo's Birthday Month

Bingo's Birthday Month

A month-long celebration of this popular game played around the world.

Read More

Other Observances on March 14th 2023

Read more about Commonwealth Day

Commonwealth Day

Commonwealth Day is a holiday that celebrates the British Commonwealth. It is observed on the second Monday in March.

Read More
Read more about Mother Tongue Day

Mother Tongue Day

Find out the dates, history and traditions of Mother Tongue Day.

Read More
Read more about International Day of Action for Rivers

International Day of Action for Rivers

Find out the dates, history and traditions of International Day of Action for Rivers.

Read More
Read more about National Children’s Craft Day

National Children’s Craft Day

Find out the dates, history and traditions of National Children’s Craft Day

Read More
All events on March 14th 2023